/Engine/Source/Runtime/Engine/Classes/PhysicsEngine/ClusterUnionComponent.h
This should only be called on the client when replication happens.
void ForceSetChildToParent ( [UPrimitiveComponent](API\Runtime\Engine\Components\UPrimitiveComponent) * InComponent, const [TArray](API\Runtime\Core\Containers\TArray)< int32 > & BoneIds, const [TArray](API\Runtime\Core\Containers\TArray)< FTransform > & ChildToParent )